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Round|Lab Grown|IGI

1.25ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG738515597

Shape and cutting style on the report: Round brilliant

Certificate IGI LG738515597

Diamond specifications and retailer prices

From $158 USD
As of October 29, 2026
Save $760 USD (83%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $918 USD at MOH London · As of October 29, 2026
View at MOH London

About this 1.25ct lab-grown round diamond

This 1.25ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG738515597 or 738515597. Listed at 13 retailers as of October 29, 2026, with prices from $158 to $918, a $760 spread on the same certified stone. MOH London lists it at $918. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.25
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.6°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG738515597
Dimensions6.92 × 6.87 × 4.21 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.92 mm6.87 mm1.25 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG738515597
Side View
Table 58.0%Crown 33.6°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: $918 USD|Low: $158 USD|High: $973 USD|Avg: $413 USD|-5.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 7$158 USD
Retailer 8$177 USD
Retailer 3$202 USD
Retailer 2$337 USD
Retailer 6$342 USD
Retailer 12$355 USD
Retailer 11$389 USD
Retailer 9$448 USD
Retailer 4$475 USD
Retailer 5$521 USD
Retailer 10$580 USD
MOH London$918 USD

35 data points across 12 retailers

13 retailers$158 USD to $918 USD

A
Cheapest Retailer
-
$158 USD
A
Retailer 2
-
$177 USD
View
Final sale: no returns
A
Retailer 3
-
$202 USD
View
A
Retailer 4
-
$337 USD
€321 EUR
View
A
Retailer 5
-
$342 USD
£270 GBP
View
B+
Retailer 6
-
$355 USD
View
A
Retailer 7
-
$389 USD
View
B+
Retailer 8
-
$448 USD
View
Retailer 9
-
$475 USD
View
Price last confirmed 34 days ago
B+
Retailer 10
-
$521 USD
View
B+
Retailer 11
-
$580 USD
View
Retailer 12
-
$594 USD
View
Price last confirmed 46 days ago
Most Expensive
B
MOH London
LG738515597 · Oct 29
$918 USD
£723 GBP
View
12 more retailers have this diamond
Prices start from $158 USDSave up to $760 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.25ct Round
$158 USD